what causes a stream to meander?
What Causes a Stream or River to `Meander’?
(First) Hydraulic Equilibrium. Let’s think about a river that flows into the ocean. But the same could be said for a river entering a lake, or some other feature that `fixes’ the eventual, or ending, river water level. The river dynamics are `controlled’ by the ending water level, the ocean …
and scroll down to `what causes a stream … to meander?